Within minutes of Guaido's declaration, the United States said it would recognize him as Venezuela's president. Washington has opposed Maduro's reign since he took over from his predecessor and mentor, Hugo Chavez, in 2013. It has slapped sanctions on Maduro's government for committing human rights abuses, undermining democracy and causing the country's debilitating economic crisis.

Many Latin American countries have in recent years swapped left-wing governments that supported Maduro for right-wing governments that oppose him. Brazil under its new far-right president, Jair Bolsonaro, is among the most notable turn-arounds. Colombia supports Guaidoand the oppositionto bring back stability to its neighbor. More than a million Venezuelan refugees have fled to Colombia since the country's economic crisis began.

The European Union has long criticized Maduro for undermining democracy and the rule of law, imposing sanctions in 2017. However, it has been softer in its support for Guaido than others. Germany, France and the United Kingdom say they support the opposition leader, but have not yet officially recognized him as Venezuela's president. Germany says it would recognize Guaido if Maduro fails to hold fresh elections.

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World takes sides on Venezuela

World takes sides on power struggle in Venezuela

Who's backing Maduro?

In Latin America, left-wing governments in Cuba and Bolivia refused to recognize Guaido's declaration. During Venezuela's boom years, Caracas sent money and subsidized oil to Cuba. In exchange, Cuba sent educated professionals, including thousands of doctors. Close ties with Maduro's government has been a cornerstone of Bolivia's foreign policy since the election of socialist President Evo Morales.

Maduro's most important backer is Russia. Moscow likes having an anti-US ally in Latin America and its biggest oil company, Rosneft, works closely with the Venezuela's state-owned oil company, PDVSA. Russia has also sold military equipment to Maduro's government and also helped it avoid default by agreeing to restructure Venezuela's $3.15 billion (€2.8 billion) debt to Moscow.

In the Middle East, Turkey and Iran voiced their support for Maduro as well. Turkey said it opposed what it called "anti-democratic developments" in Venezuela. It has also bolstered its economic ties with the Maduro government in recent years. Iran shares Venezuela's anti-US foreign policy and the two oil-exporters work together in the Organization of the Petroleum Exporting Countries (OPEC).

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Maas: 'We support what Guaido is doing'

Who's standing back?

Mexico offered Maduro tepid support. It says it recognizes him because it wants to stay neutral. During his presidential campaign, Mexican President Andres Manuel Lopez Obrador pledged to pursue a disinterested foreign policy and focus on domestic problems.

China says it also doesn't interfere in other countries' affairs and warned the United States to stay out of the Venezuelan crisis. The Foreign Ministry said Maduro and the opposition should "remain rational and level-headed and seek a political resolution ... through peaceful dialogue within the framework of the Venezuelan Constitution." Beijing is interested in avoiding any disruption in its economic relationship with Venezuela, which owes China more than $20 billion.

Venezuela on the brink

The last straw

In March 2017, violent protests erupted across the country in response to a Supreme Court decision to strip the legislative branch of its powers. Amid an international outcry, President Nicolas Maduro reversed the decision, but it was too late. Thousands continued to take to the streets, calling for new elections. More than 100 people were killed in clashes with security forces.

Venezuela on the brink

Hunger, a growing problem

The violence added to the ongoing economic and political crisis in Venezuela. Many Venezuelans spend more than 30 hours a week waiting in lines to shop, and are often confronted with empty shelves when they finally enter a store. President Maduro blames the crisis on US price speculation. The opposition, however, accuses the Socialist government of economic mismanagement.

Venezuela on the brink

Health care in crisis

The crisis has even affected health care in the oil-rich nation. Venezuelans often head to Colombia to collect medical supplies to send home, as seen in this picture. Hospitals across Venezuela have compared conditions to those seen only in war zones. As patient deaths rise, health officials have sounded the alarm on the rise of malaria and dengue fever.

Venezuela on the brink

Power grab

By July 2017, Venezuela's pro-government Constituent Assembly was established. For observers, it had all the hallmarks of a power grab. The new body adopted the authority to pass legislation on a range of issues, effectively taking away the powers of Venezuela's elected congress, which was under the opposition's control. The move drew wide international condemnation.

Venezuela on the brink

The West sanctions

In response to the political crisis, the United States and European Union imposed a series of sanctions against ruling officials. The US blacklisted members of the Constituent Assembly and froze all of Maduro's assets that are subject to US jurisdiction. The EU banned arms sales to the country.

Venezuela on the brink

Government victorious in regional elections

In October 2017, Venezuela held two votes: regional elections and elections for governors, which were long overdue. The opposition boycotted the vote, but then split, as some candidates and small parties chose to participate. This caused a deep rift within Maduro's opponents. The government went on to sweep the vote, which detractors say was unfair and heavily favored the regime.

Venezuela on the brink

Debt default

In November 2017, the oil-rich, cash-poor nation faced its day of reckoning. Credit ratings agencies declared Venezuela and its state-run oil company in "selective default." But Russia offered to restructure the South American country's debt to ensure Caracas pays its other creditors. US and EU sanctions, however, limited the chance of an agreement.

Venezuela on the brink

Presidential elections scheduled

The National Assembly announced in January 2018 that it would grant Maduro's call for snap presidential elections. The electoral authority, CNE, held the elections on May 20. The EU, the US and 14 Latin American nations warned that they would not recognize the results. The mainstream MUD opposition alliance boycotted the vote, leaving only one possible outcome.

Venezuela on the brink

Maduro wins ...

Maduro was re-elected to a second six-year term with about 68 percent of the vote. Turnout was only 46 percent, according to electoral authorities. However, the MUD opposition alliance put turnout at less than 30 percent. The Organization of American States (OAS) called the elections neither free nor fair.

Venezuela on the brink

... Guaido assumes power

But weeks into the new year, the situation took a drastic turn. On January 23, 2019, parliament president Juan Guaido declared himself interim president of Venezuela — a move that was quickly recognized by US President Donald Trump. Maduro called it a US-backed "coup." Days later, the US sanctioned Venezuela's state oil firm, while Guaido staked his claim on the country's foreign assets.